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Merge branch 'bt-address-reflection' into 'master'

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Use reflection to get local Bluetooth address

See merge request briar/briar!1202
This commit is contained in:
Torsten Grote
2020-01-08 14:05:01 +00:00
parent 4f1e9067e3 61324b1cb0
commit dd3c909b31
2 changed files with 101 additions and 61 deletions
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63
bramble-android/src/main/java/org/briarproject/bramble/util/AndroidUtils.java
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@@ -6,15 +6,25 @@ import android.content.Context;
import android.os.Build;
import android.provider.Settings;
import org.briarproject.bramble.api.Pair;
import org.briarproject.bramble.api.nullsafety.NotNullByDefault;
import java.io.File;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import javax.annotation.Nullable;
import static android.content.Context.MODE_PRIVATE;
import static android.os.Build.VERSION.SDK_INT;
import static java.util.Arrays.asList;
import static org.briarproject.bramble.api.nullsafety.NullSafety.requireNonNull;
@NotNullByDefault
public class AndroidUtils {
// Fake Bluetooth address returned by BluetoothAdapter on API 23 and later
@@ -22,11 +32,10 @@ public class AndroidUtils {
private static final String STORED_REPORTS = "dev-reports";
@SuppressWarnings("deprecation")
public static Collection<String> getSupportedArchitectures() {
List<String> abis = new ArrayList<>();
if (SDK_INT >= 21) {
abis.addAll(Arrays.asList(Build.SUPPORTED_ABIS));
abis.addAll(asList(Build.SUPPORTED_ABIS));
} else {
abis.add(Build.CPU_ABI);
if (Build.CPU_ABI2 != null) abis.add(Build.CPU_ABI2);
@@ -36,24 +45,64 @@ public class AndroidUtils {
public static String getBluetoothAddress(Context ctx,
BluetoothAdapter adapter) {
return getBluetoothAddressAndMethod(ctx, adapter).getFirst();
}
public static Pair<String, String> getBluetoothAddressAndMethod(Context ctx,
BluetoothAdapter adapter) {
// Return the adapter's address if it's valid and not fake
@SuppressLint("HardwareIds")
String address = adapter.getAddress();
if (isValidBluetoothAddress(address)) return address;
if (isValidBluetoothAddress(address)) {
return new Pair<>(address, "adapter");
}
// Return the address from settings if it's valid and not fake
address = Settings.Secure.getString(ctx.getContentResolver(),
"bluetooth_address");
if (isValidBluetoothAddress(address)) return address;
if (isValidBluetoothAddress(address)) {
return new Pair<>(address, "settings");
}
// Try to get the address via reflection
address = getBluetoothAddressByReflection(adapter);
if (isValidBluetoothAddress(address)) {
return new Pair<>(requireNonNull(address), "reflection");
}
// Let the caller know we can't find the address
return "";
return new Pair<>("", "");
}
private static boolean isValidBluetoothAddress(String address) {
private static boolean isValidBluetoothAddress(@Nullable String address) {
return !StringUtils.isNullOrEmpty(address)
&& BluetoothAdapter.checkBluetoothAddress(address)
&& !address.equals(FAKE_BLUETOOTH_ADDRESS);
}
@Nullable
private static String getBluetoothAddressByReflection(
BluetoothAdapter adapter) {
try {
Field mServiceField =
adapter.getClass().getDeclaredField("mService");
mServiceField.setAccessible(true);
Object mService = mServiceField.get(adapter);
// mService may be null when Bluetooth is disabled
if (mService == null) throw new NoSuchFieldException();
Method getAddressMethod =
mService.getClass().getMethod("getAddress");
return (String) getAddressMethod.invoke(mService);
} catch (NoSuchFieldException e) {
return null;
} catch (IllegalAccessException e) {
return null;
} catch (NoSuchMethodException e) {
return null;
} catch (InvocationTargetException e) {
return null;
} catch (SecurityException e) {
return null;
}
}
public static File getReportDir(Context ctx) {
return ctx.getDir(STORED_REPORTS, MODE_PRIVATE);
}